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https://github.com/thestk/stk
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60 lines
1.5 KiB
C++
60 lines
1.5 KiB
C++
/***************************************************/
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/*! \class PitShift
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\brief STK simple pitch shifter effect class.
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This class implements a simple pitch shifter
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using delay lines.
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by Perry R. Cook and Gary P. Scavone, 1995 - 2004.
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*/
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/***************************************************/
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#ifndef STK_PITSHIFT_H
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#define STK_PITSHIFT_H
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#include "Effect.h"
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#include "DelayL.h"
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class PitShift : public Effect
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{
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public:
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//! Class constructor.
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PitShift();
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//! Class destructor.
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~PitShift();
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//! Reset and clear all internal state.
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void clear();
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//! Set the pitch shift factor (1.0 produces no shift).
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void setShift(StkFloat shift);
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//! Compute one output sample.
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StkFloat tick(StkFloat input);
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//! Take \e vectorSize inputs, compute the same number of outputs and return them in \e vector.
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StkFloat *tick( StkFloat *vector, unsigned int vectorSize );
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//! Take a channel of the StkFrames object as inputs to the effect and replace with corresponding outputs.
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/*!
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The \c channel argument should be one or greater (the first
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channel is specified by 1). An StkError will be thrown if the \c
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channel argument is zero or it is greater than the number of
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channels in the StkFrames object.
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*/
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StkFrames& tick( StkFrames& frames, unsigned int channel = 1 );
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protected:
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DelayL delayLine_[2];
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StkFloat delay_[2];
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StkFloat env_[2];
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StkFloat rate_;
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unsigned long delayLength;
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unsigned long halfLength;
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};
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#endif
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